Magnetism

 magnetism:

1. Compasses: Compasses are small magnetic devices that can be used to determine direction by aligning with the Earth's magnetic field.

   
   

   
   
   

   
   

2. Electromagnets: Electromagnets are created by passing electric current through a coil of wire, creating a magnetic field. They are used in many devices, such as speakers, motors, and MRI machines.

   
   

   
   
   
   
   
   
   
   
   

   
   

3. Magnetic materials: Certain materials, such as iron, nickel, and cobalt, have natural magnetic properties and can be magnetized to create permanent magnets.

   
   

   
   
   
   
   
   
   
   
   

   
   

   
   

4. Magnetic levitation: Magnetic levitation, or maglev, is a method of transportation that uses magnetic levitation to suspend and propel vehicles without physical contact with the ground.

   
   

   
   
   
   
   
   

   
   

5. Magnetic storage: Magnetic storage devices, such as hard drives and magnetic tapes, use magnetic fields to store and retrieve data.

   
   

   
   
   
   
   
   

   
   

6. Magnetic resonance imaging: Magnetic resonance imaging (MRI) is a medical imaging technique that uses strong magnetic fields and radio waves to create detailed images of the body's internal structures.

   
   

   
   
   

   
   

   
   

7. Magnetic separators: Magnetic separators are used to separate magnetic materials from non-magnetic materials in industrial processes.

   
   

   
   

8. Earth's magnetic field: The Earth has a magnetic field that surrounds the planet, which helps protect us from harmful solar radiation and influences the behavior of charged particles in the atmosphere.